High Cement Content Problems Niagara Falls NY

Portland cement gives a mortar added durability, high early strength, a consistent hardening rate, and high compressive and bond strengths. However, mortar with excessively high cement contents can affect water permeability and durability of the masonry.

Local Companies

Ajax Smith, Inc.
716 877-1126
4000 River Rd.
Tonawanda, NY
Lafarge North America
(716) 694-5275
1717 New Rd
Niagara Falls, NY
Millhurst Ny
(516) 742-9555
90 Union St
Mineola, NY
S & J Sheet Metal Supply Inc
(718) 384-0800
503 Union Ave
Brooklyn, NY
Lapp Joseph Lumber Co
(585) 768-2535
Mill
Le Roy, NY
E J Militello Concrete Inc
(716) 636-2288
6465 Transit Rd
East Amherst, NY
DM Padovano Construction
716 553-7447
320 Irvington Dr
Tonawanda, NY
84 Lumber Co
(716) 731-4184
2181 Lockport Rd
Niagara Falls, NY
Cavo Builders' Supplies
(315) 724-5970
1027 Jefferson Ave
Utica, NY
Accu-Mix Mobile Concrete Co
(607) 737-0405
3398 Lower Maple Ave
Elmira, NY

Provided By:

Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: December 1, 1990


Portland cement gives a mortar added durability, high early strength, a consistent hardening rate, and high compressive and bond strengths. However, mortar with excessively high cement contents can affect water permeability and durability of the masonry. Water permeability is increased for three reasons. First, mortars with high cement content have greater shrinkage and more frequent shrinkage cracks. Shrinkage cracking often takes the form of evenly spaced vertical cracks in bed joints and evenly spaced horizontal cracks in head joints. The mortar may also separate or pull away from the body of the brick at the bond interface. Although high cement content mortar itself is less permeable, water can penetrate the shrinkage cracks. The second reason that high cement content mortars may increase water permeance is that these mortars are stiff and not easily workable. Because of this, good bond may not be achieved at the time of construction. Finally, the high strength (high cement content) mortars are hard (brittle) and don't easily accommodate movement of the masonry (due to environmental changes or foundation settlement) and therefore may result in cracking of the masonry wall. Cracks make the walls more susceptible to freeze-thaw deterioration even though hi...

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